ClinVar

Description

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 404 of the KRT6A protein (p.Asn404Ser). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with KRT6A-related conditions. ClinVar contains an entry for this variant (Variation ID: 2046245). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt KRT6A protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.